Equipment and Infrastructure support for the PICO/PICASSO Dark Matter Search Project

为 PICO/PICASSO 暗物质搜索项目提供设备和基础设施支持

• 批准号: SAPEQ-2014-00020
• 负责人: Zacek, Viktor
• 金额: $ 1.31万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Research Tools and Instruments
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=567998
• 关键词: Equipment; Infrastructure; support; PICO; PICASSO

The quest for the mysterious missing mass of the Universe has become one of the big challenges for today's particle physics and cosmology. Astronomical observations show that only 1% of the matter of the Universe is luminous and there is now convincing evidence that 85% of all gravitationally traceable matter in the Universe is of a new exotic kind, different from the "ordinary" matter surrounding us with its protons, neutrons and electrons. This so-called Cold Dark Matter (CDM) is thought to consist of so-called WIMPs (Weakly Interacting Massive Particles), neutral particles, about ten to thousand times heavier than a proton and which interact extremely weakly with each other and ordinary matter. The PICASSO* dark matter experiment is tuned to the search for WIMPs. It is based on liquid-to-vapour phase transitions which can be induced by WIMP interactions with nuclei in metastable superheated droplets. The powerful background discrimination features of the superheated liquid technique discovered by PICASSO promise “background blind” operation for up to tonne - year exposures. Therefore in December 2012 the two leading groups in the field of dark matter searches with superheated liquids, PICASSO and COUPP joint forces within the new PICO collaboration to work together towards a 500 kg dark matter experiment at SNOLAB. With superheated C4F10 or C3F8 as the active target in a 250L bubble chamber this experiment meets the definition of a next generation dark matter experiment (G2) and no other G2 experiment would have comparable sensitivities in the sectors of spin-dependent interactions and light WIMP masses. The Canadian PICASSO / PICO contingent consists of research groups of five institutions: University of Alberta, Laurentian University, Université de Montréal, Queen’s University and University of Toronto. In this grant request we ask for infrastructure and equipment support for the completion of a serious of R&D projects which are part of the preparatory phase of the 500 kg detector. *Project In Canada to Search for Supersymmetric Objects Projet d'Identification de CAnditats Supersymetriques Sombres

对宇宙的神秘失踪质量的追求已成为当今粒子物理学和宇宙学的最大挑战之一。天文观察表明，只有1％的宇宙物质是发光的，现在有令人信服的证据表明，在宇宙中，有85％的重力可追踪物质是一种新的异国情调，与其质子，中子和电子周围的“普通”物质不同。这种所谓的冷暗物质（CDM）被认为由所谓的wimps（弱相互作用的巨型颗粒）组成，中性颗粒，比质子重约十到一千倍，它们相互和普通物质非常弱。毕加索*暗物质实验调整为寻找wimps。它基于液体到蒸气相变，可以通过在亚稳态过热的液滴中与核与核的相互作用引起。毕加索（Picasso Prosise）“背景盲”操作发现的高温液体技术的强大背景歧视特征，可达最高吨的年度暴露。因此，在2012年12月，在新的PICO合作中，在暗物质搜索领域的两个领先群体搜索了，毕加索和库普联合力量在Snolab的500 kg暗物质实验中共同努力。使用过热的C4F10或C3F8作为250L气泡室中的活动目标，该实验符合下一代暗物质实验（G2）的定义，并且其他G2实验在依赖自旋依赖性相互作用和轻wIMP肿块方面没有其他G2实验。加拿大毕加索 / PICO特遣队由五个机构的研究小组组成：艾伯塔大学，劳伦斯大学，蒙特利尔大学，蒙特利尔大学，皇后大学和多伦多大学。在此赠款请求中，我们要求完成严重的研发项目的基础设施和设备支持，这是500公斤探测器的准备阶段的一部分。 *在加拿大搜索超对称对象的项目projet d'dd'de canditats supersymemetical Queries sombres sombres